John bergsten



l. BERGSTEN.

ELEVATOR.

APPLICATION FILED 056.2, |921.

Patented Nov. 7, 1922.,

gyn/vanto@ CIK Patented Nov. 7, 1922.

PATENT OFFICE.

JOHN BERGSTEN, OF TAFT, CALIFORNIA.

Application ed December 2, 1921.k SerialNo. 519,472.`

To all @from may concern:

Re it known that l, Jornv Bewerten, a

citizen ot the` United States, residingat" Taft, in the county of Kern and State of useful improvements in Elevators ot which the liollowing is a specification. y f

This invention relates to elevators for raising and lowering rods, tubing, well casings, and the like. n 1

,sin object of the present invention is the provision ot' a positive look to hold the ele .f'ator in closed position, when a tool or other article is beingrais'ed or lowered.

A further object ot the invention isthe provision of means tor retaining the elevator in open position to permit ready insertion or' a tool or other article.-

operating means normally retained in locked position by means of a spring and adapted to be retained in open position when `the elevator opened against the tension of the spring. n

ln the accompanying drawings` l have shown one embodiment ot' the invention. In this showing:

vFigure 1 is a. 'front elevation,

Figure 2 is a vertical sectional view,

Figure 3 is a horizontal sectional view on line 3 3 of Figure 1, showing the device in closed position, and, I

Figure 4 is a similar view showing the device in open position.

Referring to the drawings, the reference numeral 1 designates the body portion of the elevator whichis provided with. a longitudinal slot or passage 2. This slot is intersected by a lateral recess 3, extending from one side to a point adjacent the opposite iside. The recess is open at the rear, as designated at 4, and the portion immediately in iront ot the recess is closed by a wall 5. A gripping member 6 is pivotally mounted .on alpin 7, arranged in the recess and this gripping` member is provided with a cut-out portion S, which is adapted to aline with the passage 2 when in closed position. The cut-out pertion isprovided with jaws 9 and 10, arranged at each side. n g

A locking member 'l1 is arrangedl in the rear ot' the wall 5, the locking membery being inserted `trom the side through an opening normally covered by 'a plate 12. A s shown, the locking member is hollow and is adapted to receive a spring 13, one end of to be withdrawn.

which bears against the plate 12 to normally progectthe locking member to the position shown in' Figure 3 oi' the drawings. The

rear face of the locking member is provided California, have invented certain` new and with a. lug y14 adapted to be received in a forked end oiv a lever 15, which is pivotally mounted in the recess 3 on a pin 16". The rear end of this lever extends through the opening 4 and forms a handle 16.

The rear of the body portion is provided with a cut-outr portion 17, and a pin 18 is arranged therein. As shown, the pin is provided with an enlargement 19, forming a plunger. A threaded plug 20 normally closes the opening, and a yspring 21 is arranged between the plug and the plunger i9.' The threaded plug is provided with a longitudinal opening for the reception or The locking mechanism is provided with the rear end of the pin, forming a guide. The other end of the pin projects through wall 22 and engages the lever 15.

. Suitable trunnions 23 may be arranged on each side of the body portion, and these trunnionsk are adapted to be received in bearings 24 formed on the lower ends of arms 25 of a support which maybe of the usual n type. f

ln operation, a rod, tubing or well casing it. is retained in the elevator against vertical displacement by the flange B, formed at the junction of two sections ofthe drill rod or The tool is prevented from other tool. lateral displacement by locking member 11. which retains the gripping device in closed position. When the tool is to be removed from thecasing, the locking member is retracted against the tension of spring` 13 by means of the lever 15 and the grippingmember is turned to the position shown in Figure 4 of the drawings, permitting the tool The jaw 9, engaging the locking member, will retain the parts in this position against the tension of the springto permit a new tool to be inserted. It will be apparent that when a rod, tubing or well casing is withdrawn from the elevator, the elevator thus remains in position to receive a new tool.

TheA pin 18, bearing against the lever 16 also places the spring 21 under tension when the device is in open positionand insures proper closing of the locking member when desired.

It is to be understood that the form of the invention herewith shown and described is to be taken as a preferred example of the same, and that various changes in the shape, size, and arrangement of parts may be resorted te Without departing from the spirit of the invention or the scope of the subjoined claims.

Having thus described my invention, I claim:

l.. An elevator comprising a` body portion having a vertical passage and a lateral recess, al gripping member pivotally mounted in sail recess, said gripping member being provided with a cut-out portion adapted to aline with said passage, and a looking device cemprising a laterally movable bar adapted to retain said gripping member in open or closed position.

2. in elevator comprising a body portion having a vertical passage and a lateral re- Cess, a gripping member pivotally mounted therein, said gripping member being provided With a cutout portionu a locking device comprising a laterally movable bar adapted to retain said gripping member in open or closed position, and a spring to retain said gripping bar in operative position.

3. An elevator comprising a body portion having a vertical passage and a lateral recess, a gripping member pivotally mounted therein, said gripping member being provided. with a cut-out portion, a spring pressed locking member mounted in said recess and normally engaging said gripping member to retain it in either of two positions, and a pivoted lever engaging said locking member.

4. An elevator comprising a body portion having a vertical passage and a lateral recess, a gripping member pivotally mounted therein, said gripping member being provided With a cut-out portion, a spring pressed locking member mounted in said recess and normally engaging said gripping member to retain it in either of two positions, a pivoted lever engaging said locking member, and a spring pressed pin engaging said lever to normally maintain said locking member in operative position.

ln testimony vvhereoi I afHX my signature in presence of tivo Witnesses.

JOHN BERGSTEN.

Witnesses E. L. JONES, C. G. PATTERSON. 

